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<div class="title">RingBuffer.cpp</div>  </div>
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<a href="_ring_buffer_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_ring_buffer_8h.html">RingBuffer.h</a>&quot;</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// I CAN&#39;T GET NEW[] AND DELETE[] TO WORK....</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">/*RingBuffer::RingBuffer()</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">{</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">    RingBuffer(DEFAULT_BUFFER_SIZE);</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">}</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">RingBuffer::RingBuffer(int buffer_size) {</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">    if(buffer_size%2) { // not a power of 2</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">        size = (int)ceil(1.443*log(buffer_size));</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">    }</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">    b_size = buffer_size;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">    elems = new int[1024];</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">}</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">RingBuffer::~RingBuffer()</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">{</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">    delete[] elems;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">}*/</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#a93b9973de32a836bdf70befaf9d78eed">   23</a></span>&#160;<a class="code" href="class_ring_buffer.html#a93b9973de32a836bdf70befaf9d78eed">RingBuffer::RingBuffer</a>()</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;{</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    <span class="comment">//ctor</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;}</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#a2715b2e99ea24521ef7a586c2f33e1c9">   28</a></span>&#160;<a class="code" href="class_ring_buffer.html#a2715b2e99ea24521ef7a586c2f33e1c9">RingBuffer::~RingBuffer</a>()</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;{</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    <span class="comment">// dtor</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;}</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#a47f4fd274ccf142f55092ed851640201">   33</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="class_ring_buffer.html#a47f4fd274ccf142f55092ed851640201">RingBuffer::isFull</a>() {</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <span class="keywordflow">return</span> (b_end == (b_start ^ b_size));</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;}</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#a041d2e0a3ec68f91ea9847e220ed2501">   37</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="class_ring_buffer.html#a041d2e0a3ec68f91ea9847e220ed2501">RingBuffer::isEmpty</a>() {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keywordflow">return</span> (b_end == b_start);</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;}</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#aa14c47f5bbd73b5f8d2b83a86f01ccf2">   41</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_ring_buffer.html#aa14c47f5bbd73b5f8d2b83a86f01ccf2">RingBuffer::write</a>(<span class="keywordtype">int</span> value) {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    elems[b_end&amp;(b_size-1)] = value;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="class_ring_buffer.html#a47f4fd274ccf142f55092ed851640201">isFull</a>()) { <span class="comment">/* full, overwrite moves start pointer */</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;        b_start = increase(b_start);</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    }</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    b_end = increase(b_end);</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;}</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="class_ring_buffer.html#a8585065af57a71269bc46b30175c8dc8">   49</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="class_ring_buffer.html#a8585065af57a71269bc46b30175c8dc8">RingBuffer::read</a>() {</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keywordtype">int</span> result = elems[b_start&amp;(b_size-1)];</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    b_start = increase(b_start);</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;}</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">// increases the pointer modulo 2*size-1</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="keywordtype">int</span> RingBuffer::increase(<span class="keywordtype">int</span> p) {</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keywordflow">return</span> (p + 1)&amp;(2*b_size-1);</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;}</div>
<div class="ttc" id="class_ring_buffer_html_a8585065af57a71269bc46b30175c8dc8"><div class="ttname"><a href="class_ring_buffer.html#a8585065af57a71269bc46b30175c8dc8">RingBuffer::read</a></div><div class="ttdeci">int read()</div><div class="ttdoc">Read a value from the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00049">RingBuffer.cpp:49</a></div></div>
<div class="ttc" id="class_ring_buffer_html_a93b9973de32a836bdf70befaf9d78eed"><div class="ttname"><a href="class_ring_buffer.html#a93b9973de32a836bdf70befaf9d78eed">RingBuffer::RingBuffer</a></div><div class="ttdeci">RingBuffer()</div><div class="ttdoc">Default constructor, buffer has a size DEFAULT_BUFFER_SIZE. </div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00023">RingBuffer.cpp:23</a></div></div>
<div class="ttc" id="class_ring_buffer_html_a041d2e0a3ec68f91ea9847e220ed2501"><div class="ttname"><a href="class_ring_buffer.html#a041d2e0a3ec68f91ea9847e220ed2501">RingBuffer::isEmpty</a></div><div class="ttdeci">int isEmpty()</div><div class="ttdoc">Returns 1 (true) if the buffer is empty. </div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00037">RingBuffer.cpp:37</a></div></div>
<div class="ttc" id="_ring_buffer_8h_html"><div class="ttname"><a href="_ring_buffer_8h.html">RingBuffer.h</a></div></div>
<div class="ttc" id="class_ring_buffer_html_a2715b2e99ea24521ef7a586c2f33e1c9"><div class="ttname"><a href="class_ring_buffer.html#a2715b2e99ea24521ef7a586c2f33e1c9">RingBuffer::~RingBuffer</a></div><div class="ttdeci">virtual ~RingBuffer()</div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00028">RingBuffer.cpp:28</a></div></div>
<div class="ttc" id="class_ring_buffer_html_aa14c47f5bbd73b5f8d2b83a86f01ccf2"><div class="ttname"><a href="class_ring_buffer.html#aa14c47f5bbd73b5f8d2b83a86f01ccf2">RingBuffer::write</a></div><div class="ttdeci">void write(int value)</div><div class="ttdoc">Write a value into the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00041">RingBuffer.cpp:41</a></div></div>
<div class="ttc" id="class_ring_buffer_html_a47f4fd274ccf142f55092ed851640201"><div class="ttname"><a href="class_ring_buffer.html#a47f4fd274ccf142f55092ed851640201">RingBuffer::isFull</a></div><div class="ttdeci">int isFull()</div><div class="ttdoc">Returns 1 (true) if the buffer is full. </div><div class="ttdef"><b>Definition:</b> <a href="_ring_buffer_8cpp_source.html#l00033">RingBuffer.cpp:33</a></div></div>
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